this is happening more frequently now. when im driving my car and the rpms get to lets say 2500 the engine will jerk the car for a sec then its fine. sometimes it will do it again at 3000rpms. what is causing this?

 

whats the make and the year?a/t or 5 speed?

 

91 civic dx with mpfi swap 5 spd

 

bump

 

Have you replaced any parts yet? Change your plugs, plug wires, cap, rotor. Just try the plugs and plug wires first. If the car isn't getting enough spark to burn the fuel, it will cause the car to "hesitate". Is this happening when you are holding at a constant speed?

 

i have replaced all those parts.. iv tried replacing all the cheapest parts first. this happens wile accelerating and sometimes it doesnt even do it. sometimes the car will drive exellent. most of the time it does this

 

is it throwing a code 4? and only doesnt pass 3k when the car is warmed up. and sometimes have trouble starting up . im plannin on getting a new dist.

 

damnit i always forget stuff.. its throwing code 9 cylinder position sensor.. i got a used dizzy to replace the one that come with my mpfi swap and still throws 9

 

try checking your wiring. if it is your cylinder position sensor, you might have ran a wire to the wrong place.

 

check timing!

 

iv checked wiring over and over manytimes.. i re-did the wiring twice. same stuff. how could my timing be off from doing a mpfi swap? i know the dizzy being moved could do it but could it be making my car do this and throw a code 9? i priced out a re-built dizzy today and its 380 .. id rather buy a d16 for that much .

 

http://cgi.ebay.com/ebaymotors...wItem
New distributor on Ebay. warranty, only 140 bucks.

 

http://cgi.ebay.com/ebaymotors...wItem
My mistake... this is the Si 7 pin plug. 159 bucks

 

ya but how much for shipping to canada. will end up being close to 300.

 

sound like the clutch is slipping on a hot spot once in awhile